[灌溉对策勒绿洲多枝柽柳水分生理影响的初步研究]

[A preliminary study on the effect of irrigation on water physiology of Tamarix ramosissima in Cele oasis].

作者信息

Zeng Fanjiang, Foetzki Andrea, Li Xiangyi, Zhang Ximing, Li Xiaoming, Runge Michael

机构信息

Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011.

出版信息

Ying Yong Sheng Tai Xue Bao. 2002 Jul;13(7):849-53.

PMID:12385217

Abstract

Change characteristics of predawn water potential, water potential daily process, and transpiration rate of Tamarix ramosissima before and after irrigation was studied in Cele oasis in the south fringe of Takelamakan Desert. The results showed that the predawn water potential (-0.93 MPa) after irrigation was higher than that before irrigation (-1.04 MPa), but there was no obvious difference. So, irrigation had certain influences on the recovery of predawn water potential of T. ramosissima. The average value of water potential daily process (-2.29 MPa) after irrigation was lower than that before irrigation (-1.69 MPa). Irrigation had no influence on the increase of water potential. The transpiration rate (0.505 mmol.m-2.s-1) after irrigation was higher than that before irrigation(0.18 mmol.m-2.s-1), and compared to the soil water content and the distribution of root system before and after irrigation, it might be resulted in underground water utilization of T. ramosissima. T. ramosissima could use the underground water with its deep root system. Surface irrigation had no significant effect on the change of water condition of T. ramosissima.

摘要

在塔克拉玛干沙漠南缘的策勒绿洲，研究了灌溉前后多枝柽柳黎明前水势、水势日变化过程及蒸腾速率的变化特征。结果表明，灌溉后黎明前水势（-0.93 MPa）高于灌溉前（-1.04 MPa），但差异不明显。因此，灌溉对多枝柽柳黎明前水势的恢复有一定影响。灌溉后水势日变化过程的平均值（-2.29 MPa）低于灌溉前（-1.69 MPa）。灌溉对水势升高没有影响。灌溉后蒸腾速率（0.505 mmol·m-2·s-1）高于灌溉前（0.18 mmol·m-2·s-1），结合灌溉前后土壤含水量及根系分布情况分析，可能是多枝柽柳利用了地下水。多枝柽柳凭借其深根系能够利用地下水。地面灌溉对多枝柽柳水分状况的变化无显著影响。